期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 402, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123583
关键词
Spent LiFePO(4)cathode plate; Recycle; Core-shell material; Magnetic material; Heavy metal pollution
资金
- National Natural Science Funds for Distinguished Young Scholar of Guangdong Province, China [2020B151502094]
- National Natural Science Foundation of China [21777045, 51874199]
- SUSTech
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control [2017B030301012]
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control
- U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-AC02-76SF00515]
The study presents a new strategy to utilize spent LiFePO4 batteries by synthesizing mesoporous core-shell adsorbent from the cathode plate, achieving efficient adsorption of heavy metal ions in polluted water. The method shows high adsorption capacities for Cu2+, Cd2+, and Mn2+ ions and elucidates the detailed adsorption mechanism through comprehensive characterization techniques.
Search for simple and efficient recycling methods to utilize spent lithium-ion batteries is crucial for achieving sustainable resource development and reducing the hazardous materials released from the spent batteries. Herein, we have developed a new strategy to utilize the spent LiFePO4 batteries by utilizing the cathode plate as raw material to synthesize mesoporous core-shell adsorbent Mm@SiO2 (Mm denoted as the magnetic material) through a simple alkaline leaching process. The as-converted material exhibits excellent adsorption capacity when it has been used to remove heavy metal ions in heavy metal polluted water. The adsorption capacities for Cu2+, Cd2+, and Mn2+ have been achieved up to 71.23, 80.31 and 68.73 mg g(-1), respectively. The detailed adsorption mechanism has been elucidated with comprehensive characterization techniques, including TEM, XPS, NEXAS, and EXAFS, the edge shared [Cu2O8] bipyramids can be fit against the EXAFS data to represent the atomic-scale local structure after Mm@SiO2 adsorbs Cu2+. The present work demonstrates a novel routine to reutilize the spent lithium batteries, which is of great importance to achieve sustainable development based on the waste-to-treasure and waste-to-control-waste strategy for simultaneously reducing the hazardous release from industrial solid waste and heavy metal polluted water.
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